When you get an idea of internal practice you will find things when practicing with Endo sensei or with some of his students.

Even further than this...when you get an idea (in my case just a very little).....you start to find things in all 'regular' aikido and see how sometimes with just a change in emphasis the work of O'Sensei ....and the Aiki/IP folks becomes the same.

(just seen Marc say something very similar...so consider that seconded)